Jar-lid clamp.



No.` 897,790. PATBNTED SEPT. 1, 1908.

' I'. R. SGHRIVER.

JAR LID CLAMP.'

ArPLIourox num 001.22, 1901.

flauw RSclarL'/cr FLAVIUS R. SCHRIVER, 0F WILKINSBURG, PENNSYLVANIA.

JAR-LID CLAMP.

Specification of Letters Patent.

Patented Sept. 1, 1908.

Application filed October 22, 1907. Serial No. 398,649.

To all whom it may concern:

Be it known that I, FLAvrUs R. SCHRIVEE, a citizen of the United Statesof America, residing at Vilkinsburg, in the county of Allegheny andState of Pennsylvania, have invented new and useful Improvements in JarLid Clamps, of which the following is a speciiication.

This invention relates to jar lid clamps, the object of the inventionbeing to provide a simple, cheap and efficient clamp capable of easymanipulation for securing a ar lid to the jar and obtaining thenecessary pressure to effect a perfect seal between the lid and jar alsoto provide a construction which will enable the said clamp to be madeout of very light thin sheet metal while giving the necessary stiffness,rigidity and strength thereto and at the same time making the portionsthereof which necessarily come in contact with the hands and fingers ofthe operator in placing the clamp in position and removing it therefromsmooth so as not to injure or hurt the hand or lingers, whereby theclamp may be applied with a greater force or pressure on the part of theoperator and removed with greater ease and comfort.

With the above and other objects in view which will readily appear asthe nature of the invention is better understood, the same consists inthe novel construction, combina tion and arrangement of partshereinafter fully described, illustrated and claimed.

In the accompanying drawings, Figure 1. is a side elevation of a jar andlid, the lid being held in place by one of the improved clamps. Fig. 2is a similar view taken at right angles to Fig. 1. Fig. 3 is a verticalsection through the same, taken centrally and longitudinally of theclamp. Fig. 4 is a plan view of the jar with the lid clamped in placethereon. Fig. 5 is an enlarged cross section through the clamp.

The clamp contemplated in this invention may be constructed of very thinor light sheet metal, the same being originally in the form of a stripof suitable gage, the extremities of which are bent to one side of thebody of the strip to form terminal hooks 1, which when the article iscompleted are adapted to eX- tend beneath and engage the lower inclinedsides of the usual threads or lugs 2 on the jar at or near the top edgethereof.

Between the hook 1 the body of the strip is bent into concavo-convexshape in cross section or in other words, said strip is substantiallysemicircular in cross-section, thereby providing the central portion ofthe strip thereof as clearly illustrated in Fig. 5, the

effect of which is to materially stiffen and reinforce the hooks closelyadjacent to the bends thereof, whereby the said hooks are prevented fromspringing outward and becoming disengaged from the holding threads orlugs 2 of the ar.

The portion of the device between the terminal hooks is centrallydisposed as shown at 4 to come in contact with the center of the jarlid, forming a boss or bearing shoulder for the clamp by means of whichthe required pressure is applied to the jar lid indicated at 5, wherebysaid lid is held tightly downward on the usual gasket 6 which isinterposed between the lid and the usual annular shoulder 7 of the jar.

On opposite sides of the bearing shoulder 4, the body of the flange isarched, thus providing what may be termed arched arms or thumb pieces 8which lie between the bearing shoulderl and the hooks 1 so as to bereadily grasped by the thumb and fingers of the operator for the purposeof turning the clamp to the left or to the right for unfastening orfastening the lid.

By making the body of the device of concavo-convex or semi-circularshape in cross section a smooth round surface is provided on both sidesof both of the arms or thumb pieces S which enables the body portion ofthe device to be grasped with more comfort by the operator and to beturned on or ofl' with greater force. Furthermore, the flanges formed byshaping the body in cross section as described not only provide for thenecessary reinforcement thereof but they also materially reinforce andstrengthen the hooks 1 clear up to the point where the hooks are bent toextend under the holding threads or lugs on the jar. Thus a verypowerful and efficient clamp is economically constructed out of verythin sheet metal and one which is far easier and comfortable to handle.

Having thus fully described the invention, what is claimed as new is 1.A sheet metal jar lid clamp comprising terminal intur'ned hooks, Mand aconnectingY body which is oonoaVo-oonvex in cross seotion, said bodybeing depressed centrally to provide a central' bearing shoulder and 5arched arms or thumb pieces between said bearingl shoulder and lhehooks. i

2. A sheet metal jar lid clamp comprising terminal inturned hooks, and aconnecting body having marginal flanges, said body and flanges beingdepressed centrally to pro- 10 y'ide a central bearing shoulder andarched arms or thumb pieces between said bearing Witnesses:

F. E.. JOHNSTON, NORMAN C. MoINTosH.

